package com.huan.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.huan.reggie.common.R;
import com.huan.reggie.dto.DishDto;
import com.huan.reggie.pojo.Category;
import com.huan.reggie.pojo.Dish;
import com.huan.reggie.pojo.DishFlavor;
import com.huan.reggie.service.CategoryService;
import com.huan.reggie.service.DishFlavorService;
import com.huan.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@RestController
@Slf4j
@RequestMapping("/dish")
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private DishFlavorService dishFlavorService;

    @Autowired
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * 新增菜品
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto){
        log.info(dishDto.toString());

        dishService.saveWithFlavor(dishDto);

        //清理某个分类下面的菜品缓存数据
        String key = "dish_"+dishDto.getCategoryId()+"_1";
        redisTemplate.delete(key);

        return R.success("新增菜品成功");
    }

    /**
     * 分页查询菜品
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name){
        Page<Dish> pageInfo = new Page<>(page,pageSize);
        Page<DishDto> dishDtoPage = new Page<>();

        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();

        lambdaQueryWrapper.like(name!=null,Dish::getName,name);
        lambdaQueryWrapper.orderByDesc(Dish::getUpdateTime);

        dishService.page(pageInfo,lambdaQueryWrapper);

        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();

            Category category = categoryService.getById(categoryId);

            if(category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id){
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }

    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto){
        dishService.updateWithFlavor(dishDto);

        //清理所有菜品的缓存数据
        Set keys = redisTemplate.keys("dish_*");
        redisTemplate.delete(keys);

        return R.success("修改菜品成功");
    }


    /**
     * 根据条件查询菜品数据
     * @param dish
     * @return
     */
/*    @GetMapping("/list")
    public R<List<Dish>> list(Dish dish){
        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());

        lambdaQueryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        lambdaQueryWrapper.eq(Dish::getStatus,1);

        List<Dish> list = dishService.list(lambdaQueryWrapper);

        return R.success(list);
    }*/

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish){
        List<DishDto> dishDtoList = null;

        String key = "dish_"+dish.getCategoryId()+"_"+dish.getStatus();

        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        //如果有缓存，就从缓存中获取
        if(dishDtoList!=null){
            return R.success(dishDtoList);
        }


        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus,1);

        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);

            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());

        //如果没有缓存，就查询数据库并加入缓存，缓存60分钟
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }

    /**
     * 菜品起售停售
     * @param status
     * @param ids
     * @return
     */
    @PostMapping("/status/{status}")
    public R<String> updateStatus(@PathVariable int status, @RequestParam List<Long> ids){
        dishService.updateStatus(status, ids);
        return R.success("菜品状态修改成功");
    }

    /**
     * 批量删除菜品
     * @param ids
     * @return
     */
    @DeleteMapping
    public R<String> deleteByIds(@RequestParam List<Long> ids){
        dishService.deleteByIds(ids);
        return R.success("菜品删除成功");
    }
}
